Memorandum for Acting Under Secretary of Defense, (Comptroller)/Chief Financial Officer: Military Construction Necessary to Support the Use of Armed Forces in Addressing the National Emergency at the Southern Border [open pdf - 3MB]
From the Document: "On February 15, 2019, in accordance with the National Emergencies Act, the President declared that a national emergency exists at the southern border requiring the use of the armed forces. This declaration made available, among other statutes, 10 U.S.C. § 2808, which authorizes the Secretary of Defense, without regard to any other provision of law, to undertake military construction projects not otherwise authorized by law that are necessary to support the use of the armed forces in connection with the national emergency. Based on analysis and advice from the Chairman of the Joint Chiefs of Staff and input from the Commander, U.S. Army Corps of Engineers, the Department of Homeland Security (DHS), and the Department of the Interior and pursuant to the authority granted to me in Section 2808, I have determined that 11 military construction projects (as listed in Attachment A) along the international border with Mexico, with an estimated total cost of $3 .6 billion, are necessary to support the use of the armed forces in connection with the national emergency."
Department of Defense: http://www.defense.gov/